<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style type="text/css">
			ul{
				list-style: none;
			}
			.liu{
				float: left;
				padding: 10px 10px 10px  10px;
				margin-right: 10px;
				background-color: #FF0000;
				border-radius: 10px;
			}
			.liu:hover{
				background-color: #00FFFF;
			}
			.aa{
				color: white;
				text-decoration: none;
			}
		</style>
	</head>
	<body>
		
		<ul>
			<li class="liu"><a href="https://www.w3school.com.cn/" class="aa">W3CHool</a></li>
			<li class="liu"><a href="https://www.csdn.net/" class="aa">CSDN</a></li>
			<li class="liu"><a href="https://www.runoob.com/" class="aa">菜鸟教程</a></li>
		</ul>
	</body>
</html>
